How many plants would fill 5 acres?

Does it matter if you use a lamp instead of sunlight for a plant? Why are my echeveria leaves turning black? Do deciduous trees lose their leaves in the autumn? How long does a cottonwood tree lose cotton? How can I propagate grass effectively? What is the smalest type of tree in the world? Edible woodland mushroom with aroma of apricot with rich yellow colour? How often should you water a tomato plant? What kingdom are ferns in? Advantages of dandelions and crabgrass over lichen and mosses? What part of the caraway do you eat? What is a fly eating plant called? Will a maple tree grow back from a stump? What is the lamp black wire with white stripe? Why does the story named flower for algernon? How do green plants release oxygen? How can I propagate raspberries from cuttings? Where do angiosperm seeds develop? What do you call a person who does Topiary? How should I properly prune a banana tree to ensure healthy growth and fruit production?